/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.graphics;
import org.eclipse.swt.internal.carbon.*;
import org.eclipse.swt.*;
import java.io.*;
/**
* Instances of this class are graphics which have been prepared
* for display on a specific device. That is, they are ready
* to paint using methods such as <code>GC.drawImage()</code>
* and display on widgets with, for example, <code>Button.setImage()</code>.
* <p>
* If loaded from a file format that supports it, an
* <code>Image</code> may have transparency, meaning that certain
* pixels are specified as being transparent when drawn. Examples
* of file formats that support transparency are GIF and PNG.
* </p><p>
* There are two primary ways to use <code>Images</code>.
* The first is to load a graphic file from disk and create an
* <code>Image</code> from it. This is done using an <code>Image</code>
* constructor, for example:
* <pre>
* Image i = new Image(device, "C:\\graphic.bmp");
* </pre>
* A graphic file may contain a color table specifying which
* colors the image was intended to possess. In the above example,
* these colors will be mapped to the closest available color in
* SWT. It is possible to get more control over the mapping of
* colors as the image is being created, using code of the form:
* <pre>
* ImageData data = new ImageData("C:\\graphic.bmp");
* RGB[] rgbs = data.getRGBs();
* // At this point, rgbs contains specifications of all
* // the colors contained within this image. You may
* // allocate as many of these colors as you wish by
* // using the Color constructor Color(RGB), then
* // create the image:
* Image i = new Image(device, data);
* </pre>
* <p>
* Applications which require even greater control over the image
* loading process should use the support provided in class
* <code>ImageLoader</code>.
* </p><p>
* Application code must explicitly invoke the <code>Image.dispose()</code>
* method to release the operating system resources managed by each instance
* when those instances are no longer required.
* </p>
*
* @see Color
* @see ImageData
* @see ImageLoader
* @see <a href="http://www.eclipse.org/swt/snippets/#image">Image snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Examples: GraphicsExample, ImageAnalyzer</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*/
public final class Image extends Resource implements Drawable {
/**
* specifies whether the receiver is a bitmap or an icon
* (one of <code>SWT.BITMAP</code>, <code>SWT.ICON</code>)
* <p>
* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
* </p>
*
* @noreference This field is not intended to be referenced by clients.
*/
public int type;
/**
* the handle to the OS image resource
* (Warning: This field is platform dependent)
* <p>
* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
* </p>
*
* @noreference This field is not intended to be referenced by clients.
*/
public int handle;
/**
* The data to the OS image resource.
* (Warning: This field is platform dependent)
* <p>
* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
* </p>
*
* @noreference This field is not intended to be referenced by clients.
*/
public int data;
/**
* specifies the transparent pixel
*/
int transparentPixel = -1;
/**
* The GC the image is currently selected in.
*/
GC memGC;
/**
* The alpha data of the image.
*/
byte[] alphaData;
/**
* The global alpha value to be used for every pixel.
*/
int alpha = -1;
/**
* The width of the image.
*/
int width = -1;
/**
* The height of the image.
*/
int height = -1;
/**
* Specifies the default scanline padding.
*/
static final int DEFAULT_SCANLINE_PAD = 4;
Image(Device device) {
super(device);
}
/**
* Constructs an empty instance of this class with the
* specified width and height. The result may be drawn upon
* by creating a GC and using any of its drawing operations,
* as shown in the following example:
* <pre>
* Image i = new Image(device, width, height);
* GC gc = new GC(i);
* gc.drawRectangle(0, 0, 50, 50);
* gc.dispose();
* </pre>
* <p>
* Note: Some platforms may have a limitation on the size
* of image that can be created (size depends on width, height,
* and depth). For example, Windows 95, 98, and ME do not allow
* images larger than 16M.
* </p>
*
* @param device the device on which to create the image
* @param width the width of the new image
* @param height the height of the new image
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_INVALID_ARGUMENT - if either the width or height is negative or zero</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, int width, int height) {
super(device);
init(width, height);
init();
}
/**
* Constructs a new instance of this class based on the
* provided image, with an appearance that varies depending
* on the value of the flag. The possible flag values are:
* <dl>
* <dt><b>{@link SWT#IMAGE_COPY}</b></dt>
* <dd>the result is an identical copy of srcImage</dd>
* <dt><b>{@link SWT#IMAGE_DISABLE}</b></dt>
* <dd>the result is a copy of srcImage which has a <em>disabled</em> look</dd>
* <dt><b>{@link SWT#IMAGE_GRAY}</b></dt>
* <dd>the result is a copy of srcImage which has a <em>gray scale</em> look</dd>
* </dl>
*
* @param device the device on which to create the image
* @param srcImage the image to use as the source
* @param flag the style, either <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code>
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if srcImage is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the flag is not one of <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code></li>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon, or is otherwise in an invalid state</li>
* <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the image is not supported</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, Image srcImage, int flag) {
super(device);
if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
switch (flag) {
case SWT.IMAGE_COPY:
case SWT.IMAGE_DISABLE:
case SWT.IMAGE_GRAY:
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
device = this.device;
this.type = srcImage.type;
/* Get source image size */
int width = OS.CGImageGetWidth(srcImage.handle);
int height = OS.CGImageGetHeight(srcImage.handle);
int bpr = OS.CGImageGetBytesPerRow(srcImage.handle);
int bpc = OS.CGImageGetBitsPerComponent(srcImage.handle);
int bpp = OS.CGImageGetBitsPerPixel(srcImage.handle);
int colorspace = OS.CGImageGetColorSpace(srcImage.handle);
int alphaInfo = OS.kCGImageAlphaNoneSkipFirst;
/* Copy transparent pixel and alpha data when necessary */
alphaInfo = OS.CGImageGetAlphaInfo(srcImage.handle);
transparentPixel = srcImage.transparentPixel;
alpha = srcImage.alpha;
if (srcImage.alphaData != null) {
alphaData = new byte[srcImage.alphaData.length];
System.arraycopy(srcImage.alphaData, 0, alphaData, 0, alphaData.length);
}
/* Create the image */
int dataSize = height * bpr;
data = OS.NewPtr(dataSize);
if (data == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int provider = OS.CGDataProviderCreateWithData(0, data, dataSize, device.releaseProc);
if (provider == 0) {
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
handle = OS.CGImageCreate(width, height, bpc, bpp, bpr, colorspace, alphaInfo, provider, null, true, 0);
OS.CGDataProviderRelease(provider);
if (handle == 0) {
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
OS.memmove(data, srcImage.data, dataSize);
if (flag != SWT.IMAGE_COPY) {
/* Apply transformation */
switch (flag) {
case SWT.IMAGE_DISABLE: {
Color zeroColor = device.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
RGB zeroRGB = zeroColor.getRGB();
byte zeroRed = (byte)zeroRGB.red;
byte zeroGreen = (byte)zeroRGB.green;
byte zeroBlue = (byte)zeroRGB.blue;
Color oneColor = device.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
RGB oneRGB = oneColor.getRGB();
byte oneRed = (byte)oneRGB.red;
byte oneGreen = (byte)oneRGB.green;
byte oneBlue = (byte)oneRGB.blue;
byte[] line = new byte[bpr];
for (int y=0; y<height; y++) {
OS.memmove(line, data + (y * bpr), bpr);
int offset = 0;
for (int x=0; x<width; x++) {
int red = line[offset+1] & 0xFF;
int green = line[offset+2] & 0xFF;
int blue = line[offset+3] & 0xFF;
int intensity = red * red + green * green + blue * blue;
if (intensity < 98304) {
line[offset+1] = zeroRed;
line[offset+2] = zeroGreen;
line[offset+3] = zeroBlue;
} else {
line[offset+1] = oneRed;
line[offset+2] = oneGreen;
line[offset+3] = oneBlue;
}
offset += 4;
}
OS.memmove(data + (y * bpr), line, bpr);
}
break;
}
case SWT.IMAGE_GRAY: {
byte[] line = new byte[bpr];
for (int y=0; y<height; y++) {
OS.memmove(line, data + (y * bpr), bpr);
int offset = 0;
for (int x=0; x<width; x++) {
int red = line[offset+1] & 0xFF;
int green = line[offset+2] & 0xFF;
int blue = line[offset+3] & 0xFF;
byte intensity = (byte)((red+red+green+green+green+green+green+blue) >> 3);
line[offset+1] = line[offset+2] = line[offset+3] = intensity;
offset += 4;
}
OS.memmove(data + (y * bpr), line, bpr);
}
break;
}
}
}
init();
}
/**
* Constructs an empty instance of this class with the
* width and height of the specified rectangle. The result
* may be drawn upon by creating a GC and using any of its
* drawing operations, as shown in the following example:
* <pre>
* Image i = new Image(device, boundsRectangle);
* GC gc = new GC(i);
* gc.drawRectangle(0, 0, 50, 50);
* gc.dispose();
* </pre>
* <p>
* Note: Some platforms may have a limitation on the size
* of image that can be created (size depends on width, height,
* and depth). For example, Windows 95, 98, and ME do not allow
* images larger than 16M.
* </p>
*
* @param device the device on which to create the image
* @param bounds a rectangle specifying the image's width and height (must not be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the bounds rectangle is null</li>
* <li>ERROR_INVALID_ARGUMENT - if either the rectangle's width or height is negative</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, Rectangle bounds) {
super(device);
if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(bounds.width, bounds.height);
init();
}
/**
* Constructs an instance of this class from the given
* <code>ImageData</code>.
*
* @param device the device on which to create the image
* @param data the image data to create the image from (must not be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the image data is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the ImageData is not supported</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, ImageData data) {
super(device);
init(data);
init();
}
/**
* Constructs an instance of this class, whose type is
* <code>SWT.ICON</code>, from the two given <code>ImageData</code>
* objects. The two images must be the same size. Pixel transparency
* in either image will be ignored.
* <p>
* The mask image should contain white wherever the icon is to be visible,
* and black wherever the icon is to be transparent. In addition,
* the source image should contain black wherever the icon is to be
* transparent.
* </p>
*
* @param device the device on which to create the icon
* @param source the color data for the icon
* @param mask the mask data for the icon
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if either the source or mask is null </li>
* <li>ERROR_INVALID_ARGUMENT - if source and mask are different sizes</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, ImageData source, ImageData mask) {
super(device);
if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (mask == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (source.width != mask.width || source.height != mask.height) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
mask = ImageData.convertMask(mask);
ImageData image = new ImageData(source.width, source.height, source.depth, source.palette, source.scanlinePad, source.data);
image.maskPad = mask.scanlinePad;
image.maskData = mask.data;
init(image);
init();
}
/**
* Constructs an instance of this class by loading its representation
* from the specified input stream. Throws an error if an error
* occurs while loading the image, or if the result is an image
* of an unsupported type. Application code is still responsible
* for closing the input stream.
* <p>
* This constructor is provided for convenience when loading a single
* image only. If the stream contains multiple images, only the first
* one will be loaded. To load multiple images, use
* <code>ImageLoader.load()</code>.
* </p><p>
* This constructor may be used to load a resource as follows:
* </p>
* <pre>
* static Image loadImage (Display display, Class clazz, String string) {
* InputStream stream = clazz.getResourceAsStream (string);
* if (stream == null) return null;
* Image image = null;
* try {
* image = new Image (display, stream);
* } catch (SWTException ex) {
* } finally {
* try {
* stream.close ();
* } catch (IOException ex) {}
* }
* return image;
* }
* </pre>
*
* @param device the device on which to create the image
* @param stream the input stream to load the image from
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the stream is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_IO - if an IO error occurs while reading from the stream</li>
* <li>ERROR_INVALID_IMAGE - if the image stream contains invalid data </li>
* <li>ERROR_UNSUPPORTED_DEPTH - if the image stream describes an image with an unsupported depth</li>
* <li>ERROR_UNSUPPORTED_FORMAT - if the image stream contains an unrecognized format</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, InputStream stream) {
super(device);
init(new ImageData(stream));
init();
}
/**
* Constructs an instance of this class by loading its representation
* from the file with the specified name. Throws an error if an error
* occurs while loading the image, or if the result is an image
* of an unsupported type.
* <p>
* This constructor is provided for convenience when loading
* a single image only. If the specified file contains
* multiple images, only the first one will be used.
*
* @param device the device on which to create the image
* @param filename the name of the file to load the image from
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the file name is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_IO - if an IO error occurs while reading from the file</li>
* <li>ERROR_INVALID_IMAGE - if the image file contains invalid data </li>
* <li>ERROR_UNSUPPORTED_DEPTH - if the image file describes an image with an unsupported depth</li>
* <li>ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, String filename) {
super(device);
init(new ImageData(filename));
init();
}
void createAlpha () {
if (transparentPixel == -1 && alpha == -1 && alphaData == null) return;
int height = OS.CGImageGetHeight(handle);
int bpr = OS.CGImageGetBytesPerRow(handle);
int dataSize = height * bpr;
byte[] srcData = new byte[dataSize];
OS.memmove(srcData, data, dataSize);
if (transparentPixel != -1) {
for (int i=0; i<dataSize; i+=4) {
int pixel = ((srcData[i+1] & 0xFF) << 16) | ((srcData[i+2] & 0xFF) << 8) | (srcData[i+3] & 0xFF);
srcData[i] = (byte)(pixel == transparentPixel ? 0 : 0xFF);
}
} else if (alpha != -1) {
byte a = (byte)this.alpha;
for (int i=0; i<dataSize; i+=4) {
srcData[i] = a;
}
} else {
int width = OS.CGImageGetWidth(handle);
int offset = 0, alphaOffset = 0;
for (int y = 0; y<height; y++) {
for (int x = 0; x<width; x++) {
srcData[offset] = alphaData[alphaOffset];
offset += 4;
alphaOffset += 1;
}
}
}
OS.memmove(data, srcData, dataSize);
}
void destroy () {
if (memGC != null) memGC.dispose();
OS.CGImageRelease(handle);
data = handle = 0;
memGC = null;
}
/**
* Compares the argument to the receiver, and returns true
* if they represent the <em>same</em> object using a class
* specific comparison.
*
* @param object the object to compare with this object
* @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
*
* @see #hashCode
*/
public boolean equals (Object object) {
if (object == this) return true;
if (!(object instanceof Image)) return false;
Image image = (Image)object;
return device == image.device && handle == image.handle &&
transparentPixel == image.transparentPixel;
}
/**
* Returns the color to which to map the transparent pixel, or null if
* the receiver has no transparent pixel.
* <p>
* There are certain uses of Images that do not support transparency
* (for example, setting an image into a button or label). In these cases,
* it may be desired to simulate transparency by using the background
* color of the widget to paint the transparent pixels of the image.
* Use this method to check which color will be used in these cases
* in place of transparency. This value may be set with setBackground().
* <p>
*
* @return the background color of the image, or null if there is no transparency in the image
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Color getBackground() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (transparentPixel == -1) return null;
int red = (transparentPixel >> 16) & 0xFF;
int green = (transparentPixel >> 8) & 0xFF;
int blue = (transparentPixel >> 0) & 0xFF;
return Color.carbon_new(device, new float[]{red / 255f, green / 255f, blue / 255f, 1});
}
/**
* Returns the bounds of the receiver. The rectangle will always
* have x and y values of 0, and the width and height of the
* image.
*
* @return a rectangle specifying the image's bounds
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon</li>
* </ul>
*/
public Rectangle getBounds() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (width != -1 && height != -1) {
return new Rectangle(0, 0, width, height);
}
return new Rectangle(0, 0, width = OS.CGImageGetWidth(handle), height = OS.CGImageGetHeight(handle));
}
/**
* Returns an <code>ImageData</code> based on the receiver
* Modifications made to this <code>ImageData</code> will not
* affect the Image.
*
* @return an <code>ImageData</code> containing the image's data and attributes
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon</li>
* </ul>
*
* @see ImageData
*/
public ImageData getImageData() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
int width = OS.CGImageGetWidth(handle);
int height = OS.CGImageGetHeight(handle);
int bpr = OS.CGImageGetBytesPerRow(handle);
int bpp = OS.CGImageGetBitsPerPixel(handle);
int dataSize = height * bpr;
byte[] srcData = new byte[dataSize];
OS.memmove(srcData, data, dataSize);
PaletteData palette = new PaletteData(0xFF0000, 0xFF00, 0xFF);
ImageData data = new ImageData(width, height, bpp, palette, 4, srcData);
data.bytesPerLine = bpr;
data.transparentPixel = transparentPixel;
if (transparentPixel == -1 && type == SWT.ICON) {
/* Get the icon mask data */
int maskPad = 2;
int maskBpl = (((width + 7) / 8) + (maskPad - 1)) / maskPad * maskPad;
byte[] maskData = new byte[height * maskBpl];
int offset = 0, maskOffset = 0;
for (int y = 0; y<height; y++) {
for (int x = 0; x<width; x++) {
if (srcData[offset] != 0) {
maskData[maskOffset + (x >> 3)] |= (1 << (7 - (x & 0x7)));
} else {
maskData[maskOffset + (x >> 3)] &= ~(1 << (7 - (x & 0x7)));
}
offset += 4;
}
maskOffset += maskBpl;
}
data.maskData = maskData;
data.maskPad = maskPad;
}
for (int i = 0; i < srcData.length; i+= 4) {
srcData[i] = 0;
}
data.alpha = alpha;
if (alpha == -1 && alphaData != null) {
data.alphaData = new byte[alphaData.length];
System.arraycopy(alphaData, 0, data.alphaData, 0, alphaData.length);
}
return data;
}
/**
* Invokes platform specific functionality to allocate a new image.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>Image</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param device the device on which to allocate the color
* @param type the type of the image (<code>SWT.BITMAP</code> or <code>SWT.ICON</code>)
* @param handle the OS handle for the image
* @param data the OS data for the image
*
* @noreference This method is not intended to be referenced by clients.
*/
public static Image carbon_new(Device device, int type, int handle, int data) {
Image image = new Image(device);
image.type = type;
image.handle = handle;
image.data = data;
return image;
}
/**
* Returns an integer hash code for the receiver. Any two
* objects that return <code>true</code> when passed to
* <code>equals</code> must return the same value for this
* method.
*
* @return the receiver's hash
*
* @see #equals
*/
public int hashCode () {
return handle;
}
void init(int width, int height) {
if (width <= 0 || height <= 0) {
SWT.error (SWT.ERROR_INVALID_ARGUMENT);
}
this.type = SWT.BITMAP;
/* Create the image */
int bpr = width * 4;
int dataSize = height * bpr;
data = OS.NewPtr(dataSize);
if (data == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int provider = OS.CGDataProviderCreateWithData(0, data, dataSize, device.releaseProc);
if (provider == 0) {
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
int colorspace = device.colorspace;
handle = OS.CGImageCreate(width, height, 8, 32, bpr, colorspace, OS.kCGImageAlphaNoneSkipFirst, provider, null, true, 0);
OS.CGDataProviderRelease(provider);
if (handle == 0) {
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
/* Fill the image with white */
int bpc = OS.CGImageGetBitsPerComponent(handle);
int context = OS.CGBitmapContextCreate(this.data, width, height, bpc, bpr, colorspace, OS.kCGImageAlphaNoneSkipFirst);
if (context == 0) {
OS.CGImageRelease(handle);
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
CGRect rect = new CGRect();
rect.width = width; rect.height = height;
OS.CGContextSetRGBFillColor(context, 1, 1, 1, 1);
OS.CGContextFillRect(context, rect);
OS.CGContextRelease(context);
}
void init(ImageData image) {
if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
int width = image.width;
int height = image.height;
PaletteData palette = image.palette;
if (!(((image.depth == 1 || image.depth == 2 || image.depth == 4 || image.depth == 8) && !palette.isDirect) ||
((image.depth == 8) || (image.depth == 16 || image.depth == 24 || image.depth == 32) && palette.isDirect)))
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
/* Create the image */
int dataSize = width * height * 4;
data = OS.NewPtr(dataSize);
if (data == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int provider = OS.CGDataProviderCreateWithData(0, data, dataSize, device.releaseProc);
if (provider == 0) {
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
int colorspace = device.colorspace;
int transparency = image.getTransparencyType();
int alphaInfo = transparency == SWT.TRANSPARENCY_NONE && image.alpha == -1 ? OS.kCGImageAlphaNoneSkipFirst : OS.kCGImageAlphaFirst;
handle = OS.CGImageCreate(width, height, 8, 32, width * 4, colorspace, alphaInfo, provider, null, true, 0);
OS.CGDataProviderRelease(provider);
if (handle == 0) {
OS.DisposePtr(data);
SWT.error(SWT.ERROR_NO_HANDLES);
}
/* Initialize data */
int bpr = width * 4;
byte[] buffer = new byte[dataSize];
if (palette.isDirect) {
ImageData.blit(ImageData.BLIT_SRC,
image.data, image.depth, image.bytesPerLine, image.getByteOrder(), 0, 0, width, height, palette.redMask, palette.greenMask, palette.blueMask,
ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
buffer, 32, bpr, ImageData.MSB_FIRST, 0, 0, width, height, 0xFF0000, 0xFF00, 0xFF,
false, false);
} else {
RGB[] rgbs = palette.getRGBs();
int length = rgbs.length;
byte[] srcReds = new byte[length];
byte[] srcGreens = new byte[length];
byte[] srcBlues = new byte[length];
for (int i = 0; i < rgbs.length; i++) {
RGB rgb = rgbs[i];
if (rgb == null) continue;
srcReds[i] = (byte)rgb.red;
srcGreens[i] = (byte)rgb.green;
srcBlues[i] = (byte)rgb.blue;
}
ImageData.blit(ImageData.BLIT_SRC,
image.data, image.depth, image.bytesPerLine, image.getByteOrder(), 0, 0, width, height, srcReds, srcGreens, srcBlues,
ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
buffer, 32, bpr, ImageData.MSB_FIRST, 0, 0, width, height, 0xFF0000, 0xFF00, 0xFF,
false, false);
}
/* Initialize transparency */
if (transparency == SWT.TRANSPARENCY_MASK || image.transparentPixel != -1) {
this.type = image.transparentPixel != -1 ? SWT.BITMAP : SWT.ICON;
if (image.transparentPixel != -1) {
int transRed = 0, transGreen = 0, transBlue = 0;
if (palette.isDirect) {
RGB rgb = palette.getRGB(image.transparentPixel);
transRed = rgb.red;
transGreen = rgb.green;
transBlue = rgb.blue;
} else {
RGB[] rgbs = palette.getRGBs();
if (image.transparentPixel < rgbs.length) {
RGB rgb = rgbs[image.transparentPixel];
transRed = rgb.red;
transGreen = rgb.green;
transBlue = rgb.blue;
}
}
transparentPixel = transRed << 16 | transGreen << 8 | transBlue;
}
ImageData maskImage = image.getTransparencyMask();
byte[] maskData = maskImage.data;
int maskBpl = maskImage.bytesPerLine;
int offset = 0, maskOffset = 0;
for (int y = 0; y<height; y++) {
for (int x = 0; x<width; x++) {
buffer[offset] = ((maskData[maskOffset + (x >> 3)]) & (1 << (7 - (x & 0x7)))) != 0 ? (byte)0xff : 0;
offset += 4;
}
maskOffset += maskBpl;
}
} else {
this.type = SWT.BITMAP;
if (image.alpha != -1) {
this.alpha = image.alpha;
byte a = (byte)this.alpha;
for (int dataIndex=0; dataIndex<buffer.length; dataIndex+=4) {
buffer[dataIndex] = a;
}
} else if (image.alphaData != null) {
this.alphaData = new byte[image.alphaData.length];
System.arraycopy(image.alphaData, 0, this.alphaData, 0, alphaData.length);
int offset = 0, alphaOffset = 0;
for (int y = 0; y<height; y++) {
for (int x = 0; x<width; x++) {
buffer[offset] = alphaData[alphaOffset];
offset += 4;
alphaOffset += 1;
}
}
}
}
OS.memmove(data, buffer, dataSize);
}
/**
* Invokes platform specific functionality to allocate a new GC handle.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>Image</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param data the platform specific GC data
* @return the platform specific GC handle
*
* @noreference This method is not intended to be referenced by clients.
*/
public int internal_new_GC (GCData data) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (type != SWT.BITMAP || memGC != null) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
int width = OS.CGImageGetWidth(handle);
int height = OS.CGImageGetHeight(handle);
int bpc = OS.CGImageGetBitsPerComponent(handle);
int bpr = OS.CGImageGetBytesPerRow(handle);
int colorspace = OS.CGImageGetColorSpace(handle);
int context = OS.CGBitmapContextCreate(this.data, width, height, bpc, bpr, colorspace, OS.kCGImageAlphaNoneSkipFirst);
if (context == 0) SWT.error(SWT.ERROR_NO_HANDLES);
OS.CGContextScaleCTM(context, 1, -1);
OS.CGContextTranslateCTM(context, 0, -height);
if (data != null) {
int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
if ((data.style & mask) == 0) {
data.style |= SWT.LEFT_TO_RIGHT;
}
data.device = device;
data.background = device.COLOR_WHITE.handle;
data.foreground = device.COLOR_BLACK.handle;
data.font = device.systemFont;
data.image = this;
}
return context;
}
/**
* Invokes platform specific functionality to dispose a GC handle.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>Image</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param hDC the platform specific GC handle
* @param data the platform specific GC data
*
* @noreference This method is not intended to be referenced by clients.
*/
public void internal_dispose_GC (int context, GCData data) {
OS.CGContextRelease(context);
}
/**
* Returns <code>true</code> if the image has been disposed,
* and <code>false</code> otherwise.
* <p>
* This method gets the dispose state for the image.
* When an image has been disposed, it is an error to
* invoke any other method (except {@link #dispose()}) using the image.
*
* @return <code>true</code> when the image is disposed and <code>false</code> otherwise
*/
public boolean isDisposed() {
return handle == 0;
}
/**
* Sets the color to which to map the transparent pixel.
* <p>
* There are certain uses of <code>Images</code> that do not support
* transparency (for example, setting an image into a button or label).
* In these cases, it may be desired to simulate transparency by using
* the background color of the widget to paint the transparent pixels
* of the image. This method specifies the color that will be used in
* these cases. For example:
* <pre>
* Button b = new Button();
* image.setBackground(b.getBackground());
* b.setImage(image);
* </pre>
* </p><p>
* The image may be modified by this operation (in effect, the
* transparent regions may be filled with the supplied color). Hence
* this operation is not reversible and it is not legal to call
* this function twice or with a null argument.
* </p><p>
* This method has no effect if the receiver does not have a transparent
* pixel value.
* </p>
*
* @param color the color to use when a transparent pixel is specified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the color is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setBackground(Color color) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (transparentPixel == -1) return;
byte red = (byte)((transparentPixel >> 16) & 0xFF);
byte green = (byte)((transparentPixel >> 8) & 0xFF);
byte blue = (byte)((transparentPixel >> 0) & 0xFF);
byte newRed = (byte)((int)(color.handle[0] * 255) & 0xFF);
byte newGreen = (byte)((int)(color.handle[1] * 255) & 0xFF);
byte newBlue = (byte)((int)(color.handle[2] * 255) & 0xFF);
int height = OS.CGImageGetHeight(handle);
int bpl = OS.CGImageGetBytesPerRow(handle);
byte[] line = new byte[bpl];
for (int i = 0, offset = 0; i < height; i++, offset += bpl) {
OS.memmove(line, data + offset, bpl);
for (int j = 0; j < line.length; j += 4) {
if (line[j+ 1] == red && line[j + 2] == green && line[j + 3] == blue) {
line[j + 1] = newRed;
line[j + 2] = newGreen;
line[j + 3] = newBlue;
}
}
OS.memmove(data + offset, line, bpl);
}
transparentPixel = (newRed & 0xFF) << 16 | (newGreen & 0xFF) << 8 | (newBlue & 0xFF);
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the receiver
*/
public String toString () {
if (isDisposed()) return "Image {*DISPOSED*}";
return "Image {" + handle + "}";
}
}